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'The machines have one of the worst UI designs I have ever witnessed which confuses and delays ...'

The few stations where I've witnessed this, the bloke standing by the machine will just wave people through an open gate, provided they don't look like someone who will be a fare-dodger; which seems a very efficient way of doing things really?

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On a couple of occasions they refused to do that, not sure why. Still, what is the point of ticket machines and barriers if you are going to wave people through based on bouncer principles.

Exactly.

Ironically, today, we read about a supermarket with no checkout yet we still have simple ticket barriers that quite often don't work?

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